KROHNE BM 700 EN - Manual (Page 9)

BM 700 Installation and Operating Instructions Page 9
Function of keys (only for version with local display)
Operator control via the keys: For reasons of electrical safety, the keys (below the
display, when housing is open) may only be actuated for servicing and repair work by
specialist personnel, on no account, however, when there is risk of explosion!
Operator control can be carried out with the aid of the supplied bar magnet without
opening the housing. However, a particularly convenient form of parameter setting is
offered by the PC program PC-CAT (special accessories, see above).
→
(cursor key): - selects the configuration menu,
- branches the menu to the next lower level,
- shifts the cursor* to the next column on the right.
↑
(select key): - branches the menu to the next digit on the same level,
- changes the content (digit, text character) at the cursor*
position.
↵
(ENTER key): - branches the menu to the next higher level,
- stores newly entered parameters,
- executes displayed functions,
- selects special functions (e.g. error memory, see Sect. 5).
* The cursor position is signalled by flashing of the character or the option at the appropriate place.
Meaning of status markers (only for version with local display)
The 6 markers below the local display only show information about the status of
measurement and are no error displays!
1: No current measured value: The device is searching for a new value. If the
search for a plausible level fails for a certain time, "SIGNAL DOWN" appears as
error display.
2: Signal too strong: Mean of reflected microwaves is very high. Gain is automa-
tically stepped down.
3: Poor spectrum: Brief showing of this marker has no significance. If permanent-
ly on, this may result in uncertain (incorrect) measured values or the error
message "NO M.VALUE".
4: No measured value as yet: Evaluable measured values not available after the
device has been started up. Measured value automatically set to the level of the
tank bottom. This marker disappears when the first valid measured value is
obtained.
5: Tank bottom: In tanks with dished bottom, for example, the measuring signal
can "disappear" if measurements are carried out near the bottom. The mea-
sured value is then automatically set to the level of the tank bottom.
6: Measurement frozen: Device is in the block distance detection (see below).
Description of functions
The table on the following 2 pages provides an overview of all parameters that can
be set in the configuration menu.
This is followed by more precise explanations of some functions and a typical
configuration.